Al- &amp; mg-compatible blasting material for blast cleaning thereof based on alsc powder

ABSTRACT

A blasting medium for blasting a component, wherein the component comprises Al and/or Mg, especially an Al and/or Mg alloy, to a method of blasting a component, wherein the component comprises Al and/or Mg, especially an Al and/or Mg alloy, and a method of producing a blasting medium are described herein.

FIELD OF THE INVENTION

The present invention relates to a blasting medium for blasting a component, wherein the component comprises Al and/or Mg, especially an Al and/or Mg alloy, to a method of blasting a component, wherein the component comprises Al and/or Mg, especially an Al and/or Mg alloy, and to a method of producing a blasting medium.

BACKGROUND OF THE INVENTION

Especially in the case of components which contain aluminium or magnesium, for example Al and/or Mg alloys, and which have been produced especially by means of a powder fusion method or a powder sintering method, there should be removal of powder residues adhering after the production in the machine, which can be disadvantageous in a further processing operation, for example owing to the roughness thus generated.

Typically, surfaces are freed of such components by means of sandblasting or blasting with corundum. As an alternative, it is also possible to use ceramic-based materials or grit for blasting, and also, for example, materials based on iron alloys as described, for example, in US2016375549.

However, the corresponding blasting media, in the case of components containing aluminium or magnesium, especially Al, differ from the material of the component and can lead to contamination when, for example, blasting media get caught in the surface and/or abraded material chemically contaminates the surfaces of the Al or Mg components with non-alloy material, which can lead to corrosion problems or strength problems. This is the case especially when high-strength alloys such as AlMgSc alloys, for example Scalmalloy® alloys, are blasted. Therefore, yet a further pickling step may follow here in order to remove this blasting material. However, such a step is associated with further cost and inconvenience.

BRIEF SUMMARY OF THE INVENTION

Against this background, a problem addressed by aspects of the present invention is that of providing an improved method of blasting a component comprising Al and/or Mg, and a blasting material which can be used in such a method.

An idea underlying the present invention is that the component comprising Al and/or Mg is blasted with a blasting medium comprising an Al and/or Mg alloy, i.e. the blasting medium is of the same type of material or at least similar to the material of the component, which can reduce or even prevent contamination.

Advantageous configurations and developments will be apparent from the description with reference to the figures.

Unless defined otherwise, technical and scientific expressions used herein have the same meaning as commonly understood by a person skilled in the art in the field of the invention.

Figures reported in the context of the present invention are based on % by weight, unless otherwise stated or apparent from the context. In the blasting medium according to the invention, the percentages by weight add up to 100% by weight, unless otherwise apparent from the context.

In the context of the invention, a blasting medium, also referred to as blasting material, is an auxiliary which can be used in blasting. It comprises a multitude of particles that typically all consist essentially of the same material. In the context of the invention, with regard to the blasting medium according to the invention or to the methods according to the invention, the shape of the particles of the blasting medium is not particularly restricted, and the particles may be round, polygonal and/or angular and are, for example, polygonal and angular. In the methods according to the invention, the blasting medium typically has a higher hardness than the component to be blasted, especially in order that it can in fact fulfil its function. More particularly, the blasting medium according to the invention consists of one alloy or multiple alloys, especially one alloy, i.e. more particularly does not comprise any ceramic components. The blasting medium is especially used for cleaning and/or surface smoothing, i.e. is a cleaning and/or surface smoothing blasting medium. More particularly, the blasting medium according to the invention, in particular embodiments, is chemically inert toward the material of the component to be blasted, i.e. does not damage the component, for example by corrosion.

In a first aspect, the present invention relates to a blasting medium for blasting a component, wherein the component comprises Al and/or Mg, especially an Al and/or Mg alloy, wherein the blasting medium comprises an Al and/or Mg alloy.

The component here is not particularly restricted, provided that it comprises Al and/or Mg, especially Al, and may have any shape and configuration. In particular embodiments, at least one surface of the component to be blasted comprises Al and/or Mg, especially an Al and/or Mg alloy, for example an alloy comprising Al and Mg. In particular embodiments, the component consists essentially of an Al and/or Mg alloy or consists of the Al and/or Mg alloy. The Al and/or Mg alloy is not particularly restricted here and may be, for example, an alloy of Al with a suitable material, i.e., for example, a 1xxx, 2xxx, 3xxx, 4xxx, 5xxx, 6xxx, 7xxx or 8xxx alloy.

In particular embodiments, the component comprises Sc, especially in an amount of 0.3% by weight or more, preferably 0.5% by weight or more, for example 0.5-3% by weight of Sc, for example 0.7-0.8% by weight of Sc. In particular embodiments, the component comprises an AlSc alloy, especially an AlMgSc alloy, and the component preferably consists of an AlSc alloy, especially an AlMgSc alloy, especially having an Sc content of 0.3% by weight or more, preferably 0.5% by weight or more, for example 0.5-3% by weight, for example 0.7-0.8% by weight.

As well as Al and/or Mg, the component, especially in addition to Sc, may also comprise further alloy constituents that are not particularly restricted. In particular embodiments, the component comprises Zr and/or Mn. In particular embodiments, the component comprises an AlSc alloy, especially an AlMgSc alloy, comprising Zr and/or Mn, especially Zr, and especially consists of such an alloy. The ratio of Zr to Sc here is especially within a range from 1:10 to 2:1, preferably 1:7 to 1:1, further preferably 1:5 to 1:2. It is of course also possible, in particular embodiments, for unavoidable impurities to be present.

In particular embodiments, the component has been produced by a powder fusion method or a powder sintering method, preferably by a laser powder bed fusion method. The powder fusion method and the powder sintering method are not particularly restricted here, and examples of such methods include selective laser sintering, electron beam fusion or selective laser fusion, although the methods are not particularly restricted. More particularly, the component is produced by laser powder bed fusion (LBP-F), as used, for example, for 3D printing. The method itself is again not particularly restricted here. More particularly, the production is effected with powders having a particle size of 20 to 75 μm, preferably 20 to 65 μm, further preferably 20 to 45 μm. Corresponding powder fractions can be obtained correspondingly by a sieve analysis with appropriate sieves having mesh sizes of 20 μm, 45 μm, 65 μm, and 75 μm, according to the desired fraction.

The blasting medium is not particularly restricted either, provided that it comprises an Al and/or Mg alloy.

A powder for the production of the blasting medium can be produced by customary methods of producing powders for powder metallurgy and/or for powder fusion methods or powder sintering methods, preferably laser powder bed fusion methods, which are not particularly restricted. For example, the powder for the production of the blasting medium can be produced by atomizing a metal melt or a melt of a metal alloy and separating of a suitable particle fraction. In particular embodiments, the powder for the blasting medium is produced by the same method as the material for the production of the component. In particular embodiments, the powder for the blasting medium and the powder for production of the component are produced in the same method, especially in the same method step, for example a powder production campaign, such that, for example, the two powders from the production campaign can be separated from one another, for example by sieving. More particularly, particles of the powder produced that are not used for the production of the component, for example on account of particle size, are used for the production of the blasting medium. More particularly, the particles for production of the blasting medium are larger than the particles for production of the component.

In particular embodiments, the blasting medium comprises Sc, especially in an amount of 0.3% by weight or more, preferably 0.5% by weight or more, for example 0.5-3% by weight of Sc, for example 0.7-0.8% by weight of Sc. In particular embodiments, the blasting medium comprises an AlSc alloy, especially an AlMgSc alloy, and the component preferably consists of an AlSc alloy, especially an AlMgSc alloy, especially having an Sc content of 0.3% by weight or more, preferably 0.5% by weight or more, for example 0.5-3% by weight, for example 0.7-0.8% by weight. The particular advantage in the use of such an alloy is that its chemical behaviour can be essentially like that of pure aluminium.

As well as Al and/or Mg, the blasting medium, especially as well as Sc, may also comprise further alloy constituents that are not particularly restricted. In particular embodiments, the blasting medium comprises Zr and/or Mn. In particular embodiments, the blasting medium comprises an AlSc alloy, especially an AlMgSc alloy, comprising Zr and/or Mn, especially Zr, and especially consists of such an alloy. The ratio of Zr to Sc here is especially within a range from 1:10 to 2:1, preferably 1:7 to 1:1, further preferably 1:5 to 1:2. It is of course also possible in particular embodiments for unavoidable impurities to be present.

In particular embodiments, the blasting medium comprises particles of the Al and/or Mg alloy having a size of 45 μm or more, preferably 65 μm or more, further preferably 75 μm or more, even further preferably at least 80 μm, for example having a particle size x of 45 μm≤x≤200 μm, preferably 65 μm≤x≤200 μm, further preferably 75 μm≤x≤200 μm, even further preferably 80 μm≤x≤200 μm, and especially preferably consists of these. Corresponding particles may in turn be obtained, for example, by a sieve analysis with sieves having mesh sizes of 45 μm, 65 μm, 75 μm, 80 μm, and 200 μm, according to the desired fraction. When the particles of the blasting medium are too small, they create too little effect on blasting. When the particles are too large, they are more difficult to accelerate sufficiently for blasting to display a suitable effect.

In particular embodiments, the blasting medium has been hardened by a heat treatment at a temperature of 250° C.-400° C., preferably 275° C.-350° C., further preferably 300-325° C., e.g. 325° C., and/or within a period of 15-6000 min, preferably 60 to 240 min, further preferably 90 to 150 min, e.g. 120 min. In this way, the blasting medium can be further solidified compared to untreated particles. Especially when the blasting medium comprises Al and Sc, preferably Al, Mg and Sc, precipitation hardening of the Sc can be effected here, such that a coherent Al3Sc phase can form. When Zr is additionally present, it is additionally possible for an Al3ScZr phase to form, which can contribute further to the hardness of the blasting medium. Preferably, the blasting medium has been hardened by a heat treatment at a temperature of 250° C.-400° C., preferably 275° C.-350° C., further preferably 300-325° C., e.g. 325° C., within a period of 15-6000 min, preferably 60 to 240 min, further preferably 90 to 150 min, e.g. 120 min. In this context, preferably, the higher the temperature for the heat treatment, the shorter the period of the heat treatment.

In particular embodiments, the blasting medium has a hardness of >150 HB. Hardness can be determined here in a suitable manner, for example according to Brinell, for example in accordance with EN ISO 6506 (EN ISO 6506-1 to EN ISO 6506-4).

A further aspect of the present invention relates to a method of blasting a component, wherein the component comprises Al and/or Mg, especially an Al and/or Mg alloy, wherein the blasting medium comprises an Al and/or Mg alloy, wherein the component is blasted with the blasting medium. In particular embodiments, the blasting medium in this method is especially the blasting medium according to the invention.

In particular embodiments, the blasting medium comprises an AlSc alloy, preferably an AlMgSc alloy.

In particular embodiments, the blasting medium comprises particles of the Al and/or Mg alloy having a size of 45 μm or more, preferably 65 μm or more, further preferably 75 μm or more, even further preferably at least 80 μm, for example having a particle size x of 45 μm≤x≤200 μm, preferably 65 μm≤x≤200 μm, further preferably 75 μm≤x≤200 μm, even further preferably 80 μm≤x≤200 μm, and especially preferably consists of these. Corresponding particles can in turn be obtained, for example, by a sieve analysis with sieves having mesh sizes of 45 μm, 65 μm, 75 μm, 80 μm, and 200 μm, according to the desired fraction.

In particular embodiments, a content of Sc in the blasting medium is at least 0.5% by weight, based on the blasting medium.

In particular embodiments, the blasting medium has been hardened by a heat treatment at a temperature of 250° C.-400° C., preferably 275° C.-350° C., further preferably 300-325° C., e.g. 325° C., and/or within a period of 15-6000 min, preferably 60 to 240 min, further preferably 90 to 150 min, e.g. 120 min. In particular embodiments, the blasting medium has a hardness of >150 HB.

In particular embodiments, the component has been produced by a powder fusion method or a powder sintering method, preferably by a laser powder bed fusion method.

In particular embodiments, the component consists of a material of the same kind as and/or a similar material to the blasting medium. The component preferably consists of the same material as the blasting medium.

In particular embodiments, an Al and/or Mg alloy is atomized from a melt and a particle fraction is sieved out of the particles thus produced.

In particular embodiments, particles having a size of 45 μm or more, preferably 65 μm or more, further preferably 75 μm or more, even further preferably at least 80 μm, for example having a particle size x of 45 μm≤x≤200 μm, preferably 65 μm≤x≤200 μm, further preferably 75 μm≤x≤200 μm, even further preferably 80 μm≤x≤200 μm, are sieved out of the particles produced as blasting medium. Corresponding particles can be obtained, for example, by sieving with sieves having mesh sizes of 45 μm, 65 μm, 75 μm, 80 μm, and 200 μm, according to the desired fraction.

In particular embodiments, the sieved-out particles are hardened at a temperature of 250° C.-400° C., preferably 275° C.-350° C., further preferably 300-325° C., e.g. 325° C., and/or within a period of 15-6000 min, preferably 60 to 240 min, further preferably 90 to 150 min, e.g. 120 min. Preferably, the sieved-out particles are hardened by a heat treatment at a temperature of 250° C.-400° C., preferably 275° C.-350° C., further preferably 300-325° C., e.g. 325° C., within a period of 15-6000 min, preferably 60 to 240 min, further preferably 90 to 150 min, e.g. 120 min.

In particular embodiments, the particles for production of the component can be sieved out of the remaining particles, for example as specified above.

One advantage of this method of the invention here is that the blasting medium can be separated off again by sieving after the blasting of the component and hence reused, for example in another blasting process or blasting method.

In yet a further aspect, the present invention relates to a method of producing a blasted component, wherein the component comprises Al and/or Mg, especially an Al and/or Mg alloy, wherein the component is produced by a powder fusion method or a powder sintering method and is blasted with the blasting medium of the invention.

The component is not particularly restricted here, provided that it comprises Al and/or Mg, especially Al, and may have any shape and configuration. In particular embodiments, at least one surface of the component to be blasted comprises Al and/or Mg, especially an Al and/or Mg alloy, for example an alloy comprising Al and Mg. In particular embodiments, the component consists essentially of an Al and/or Mg alloy or consists of the Al and/or Mg alloy. The Al and/or Mg alloy is not particularly restricted here and may be, for example, an alloy of Al with a suitable material, i.e., for example, a 1xxx, 2xxx, 3xxx, 4xxx, 5xxx, 6xxx, 7xxx or 8xxx alloy.

In particular embodiments, the component comprises Sc, especially in an amount of 0.3% by weight or more, preferably 0.5% by weight or more, for example 0.5-3% by weight Sc, for example 0.7-0.8% by weight Sc. In particular embodiments, the component comprises an AlSc alloy, especially an AlMgSc alloy, and the component preferably consists of an AlSc alloy, especially an AlMgSc alloy, especially having an Sc content of 0.3% by weight or more, preferably 0.5% by weight or more, for example 0.5-3% by weight, for example 0.7-0.8% by weight.

As well as Al and/or Mg, the component, especially as well as Sc, may also comprise further alloy constituents that are not particularly restricted. In particular embodiments, the component comprises Zr and/or Mn. In particular embodiments, the component comprises an AlSc alloy, especially an AlMgSc alloy, comprising Zr and/or Mn, especially Zr, and especially consists of such an alloy. The ratio of Zr to Sc here is especially within a range from 1:10 to 2:1, preferably 1:7 to 1:1, further preferably 1:5 to 1:2.

The component has been produced by a powder fusion method or a powder sintering method, preferably by a laser powder bed fusion method. The powder fusion method and the powder sintering method are not particularly restricted, and examples of such methods include selective laser sintering, electron beam fusion or selective laser fusion, although the methods are not particularly restricted. More particularly, the component is produced by laser powder bed fusion (LBP-F), as used, for example, for 3D printing. The method itself is again not particularly restricted here. More particularly, the production is effected with powders having a particle size of 20 to 75 μm, preferably 20 to 65 μm, further preferably 20 to 45 μm. Corresponding powder fractions can be obtained correspondingly by sieve analysis with appropriate sieves having mesh sizes of 20 μm, 45 μm, 65 μm, and 75 μm, according to the desired fraction.

In particular embodiments, the powder for the blasting medium is produced by the same method as the material for the production of the component. In particular embodiments, the powder for the blasting medium and the powder for production of the component are produced in the same method, especially in the same method step, for example a powder production campaign, such that, for example, the two powders from the production campaign can be separated from one another, for example by sieving. More particularly, particles of the powder produced that are not used for the production of the component, for example on account of particle size, are used for the production of the blasting medium. More particularly, the particles for production of the blasting medium are larger than the particles for production of the component.

Additionally disclosed is a component, wherein the component comprises Al and/or Mg, especially an Al and/or Mg alloy, wherein the component is produced by a powder fusion method or a powder sintering method and is blasted with the blasting medium according to the invention.

The component here is again not particularly restricted, provided that it comprises Al and/or Mg, especially Al, and may have any shape and configuration. In particular embodiments, at least one surface of the component to be blasted comprises Al and/or Mg, especially an Al and/or Mg alloy, for example an alloy comprising Al and Mg. In particular embodiments, the component consists essentially of an Al and/or Mg alloy or consists of the Al and/or Mg alloy. The Al and/or Mg alloy is not particularly restricted here and may, for example, be an alloy of Al with a suitable material, i.e., for example, a 1xxx, 2xxx, 3xxx, 4xxx, 5xxx, 6xxx, 7xxx or 8xxx alloy.

In particular embodiments, the component comprises Sc, especially in an amount of 0.3% by weight or more, preferably 0.5% by weight or more, for example 0.5-3% by weight of Sc, for example 0.7-0.8% by weight of Sc. In particular embodiments, the component comprises an AlSc alloy, especially an AlMgSc alloy, and the component preferably consists of an AlSc alloy, especially an AlMgSc alloy, especially having an Sc content of 0.3% by weight or more, preferably 0.5% by weight or more, for example 0.5-3% by weight, for example 0.7-0.8% by weight.

As well as Al and/or Mg, the component, especially as well as Sc, may also comprise further alloy constituents that are not particularly restricted. In particular embodiments, the component comprises Zr and/or Mn. In particular embodiments, the component comprises an AlSc alloy, especially an AlMgSc alloy, comprising Zr and/or Mn, especially Zr, and especially consists of such an alloy. The ratio of Zr to Sc here is especially within a range from 1:10 to 2:1, preferably 1:7 to 1:1, further preferably 1:5 to 1:2.

The component has been produced by a powder fusion method or a powder sintering method, preferably by a laser powder bed fusion method. The powder fusion method and the powder sintering method are not particularly restricted, and examples of such methods include selective laser sintering, electron beam fusion or selective laser fusion, although the methods are not particularly restricted. More particularly, the component is produced by laser powder bed fusion (LBP-F), as used, for example, for 3D printing. The method itself is again not particularly restricted here. More particularly, the production is effected with powders having a particle size of 20 to 75 μm, preferably 20 to 65 μm, further preferably 20 to 45 μm. Corresponding powder fractions can be obtained correspondingly by sieve analysis with appropriate sieves having mesh sizes of 20 μm, 45 μm, 65 μm, and 75 μm, according to the desired fraction.

In particular embodiments, the powder for the blasting medium is produced by the same method as the material for the production of the component. In particular embodiments, the powder for the blasting medium and the powder for production of the component are produced in the same method, especially in the same method step, for example a powder production campaign, such that, for example, the two powders from the production campaign can be separated from one another, for example by sieving. More particularly, particles of the powder produced that are not used for the production of the component, for example on account of particle size, are used for the production of the blasting medium. More particularly, the particles for production of the blasting medium are larger than the particles for production of the component.

The above configurations and developments can, if viable, be combined with one another as desired. Further possible configurations, developments and implementations of the invention also include combinations not explicitly mentioned of features of the invention described above or hereinafter with regard to the working examples. More particularly, the person skilled in the art will also add on individual aspects as improvements or supplementations to the respective basic form of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is elucidated in detail hereinafter by the working examples given in the schematic figures. The figure shows:

FIG. 1 a schematic of a method of producing a component, wherein the component is blasted with the blasting medium of the invention.

DETAILED DESCRIPTION

The appended figures are intended to impart further understanding of the embodiments of the invention. They illustrate embodiments and, in connection with the description, serve to elucidate principles and concepts of the invention. Other embodiments and many of the advantages mentioned are apparent with regard to the drawings. The elements of the drawings are not necessarily shown true to scale in relation to one another.

In the figures of the drawing, elements, features and components that are the same, have the same function and have the same effect—unless stated otherwise—are each given the same reference numerals.

FIG. 1 shows, in schematic form, a procedure by which, in a method, an illustrative component and an illustrative blasting medium can be produced and the component can be blasted with the blasting medium.

In an illustrative production method for a blasted component according to the invention and also the production of a blasting material according to the invention, in a first step 1, a melt comprising Al, Mg and Sc is produced. One example of such a melt is a melt of AlMg_(4.5)Sc_(0.75)Zr_(0.3), which can be produced, for example, at a temperature of about 800° C. In one step, atomizing of the melt comprising Al, Mg and Sc, i.e., for example, of the AlMg_(4.5)Sc_(0.75)Zr_(0.3) melt, takes place, which is not particularly restricted. The result here is a powder of the alloy, which is referred to hereinafter as AlMgSc powder. In a subsequent step 3, the AlMgSc powder produced is separated and sieved out. Then, in step 4, the separated powder fractions can be used to produce a component using a first powder fraction and to provide a further powder fraction for production of a blasting medium. For example, a fraction having a particle size of less than 20 μm can be separated from the AlMgSc powder, and this can be fed in turn, for example, to step 1, since the particles of the fraction may be too small for the production of a component. A further fraction may, for example, have a particle size within a range of 20 to <65 μm, which is used for production of a component by means of a laser powder bed fusion method (which is not particularly restricted). A further, third fraction of the powder having a particle size of, for example, 65 μm or more, e.g. 75 μm-200 μm, can then be used to produce a blasting medium. In step 5, this further, third powder fraction is then hardened to produce the blasting medium, for example at a temperature of 325° C. for a period of 120 min. This makes the blasting medium harder than the component, such that it is of good suitability for abrasive blast cleaning. In step 6, the component produced in step 4 is blasted with the blasting medium produced in step 5, for example for a blast cleaning and/or blast smoothing operation and/or consolidation blasting of the component produced by means of the laser powder bed fusion method. This production step 6 may followed by an optional step 7 in which the blasting medium is reused or utilized again, for example by separating it off again by sieving after the blasting.

While at least one exemplary embodiment of the present invention(s) is disclosed herein, it should be understood that modifications, substitutions and alternatives may be apparent to one of ordinary skill in the art and can be made without departing from the scope of this disclosure. This disclosure is intended to cover any adaptations or variations of the exemplary embodiment(s). In addition, in this disclosure, the terms “comprise” or “comprising” do not exclude other elements or steps, the terms “a” or “one” do not exclude a plural number, and the term “or” means either or both. Furthermore, characteristics or steps which have been described may also be used in combination with other characteristics or steps and in any order unless the disclosure or context suggests otherwise. This disclosure hereby incorporates by reference the complete disclosure of any patent or application from which it claims benefit or priority.

LIST OF REFERENCE NUMERALS

-   -   1 Production of a melt comprising Al, Mg and Sc     -   2 Atomizing of the melt comprising Al, Mg and Sc     -   3 Separating and sieving-out of the AlMgSc powder obtained     -   4 Production of a component using a powder fraction and         provision of a further powder fraction for production of a         blasting medium     -   5 Hardening of the further powder fraction to produce the         blasting medium     -   6 Blasting of the component with the blasting medium     -   7 Optionally reuse of the blasting medium 

1. A blasting medium for blasting a component, wherein the component comprises Al and/or Mg, wherein the blasting medium comprises an Al and/or Mg alloy.
 2. The blasting medium according to claim 1, wherein the blasting medium comprises an AlSc alloy.
 3. The blasting medium according to claim 1, wherein the blasting medium comprises particles of the Al and/or Mg alloy having a size of 45 μm or more.
 4. The blasting medium according to claim 1, wherein a content of Sc in the blasting medium is at least 0.5% by weight, based on the blasting medium.
 5. The blasting medium according to claim 1, wherein the blasting medium has been hardened by a heat treatment at a temperature of 250° C.-400° C. and/or within a period of 15-6000 min and/or has a hardness of >150 HB.
 6. A method of blasting a component, wherein the component comprises Al and/or Mg, wherein the blasting medium comprises an Al and/or Mg alloy, wherein the method comprises: blasting the compound with the blasting medium.
 7. The method according to claim 6, wherein the blasting medium comprises an AlSc alloy.
 8. The method according to claim 6, wherein the blasting medium comprises particles of the Al and/or Mg alloy having a size of 45 μm or more.
 9. The method according to claim 6, wherein a content of Sc in the blasting medium is at least 0.5% by weight, based on the blasting medium.
 10. The method according to claim 6, wherein the blasting medium has been hardened by a heat treatment at a temperature of 250° C.-400° C. and/or within a period of 15-6000 min and/or has a hardness of >150 HB.
 11. The method according to claim 6, wherein the component has been produced by a powder fusion method or a powder sintering method, wherein the component further comprises a material of the same type as the blasting medium.
 12. The method of producing a blasting medium, wherein an Al and/or Mg alloy is atomized from a melt, and a particle fraction is sieved out of the particles thus produced.
 13. The method according to claim 12, wherein particles having a size of 45 μm or more, are sieved out of the particles produced as blasting medium, wherein the sieved-out particles are hardened at a temperature of 250° C.-400° C. and/or within a period of 15-6000 min.
 14. The method of producing a blasted component, wherein the component comprises Al and/or Mg, wherein the component is produced by a powder fusion method or a powder sintering method and is blasted with a blasting medium according to claim
 1. 15. A component, wherein the component comprises Al and/or Mg, wherein the component is produced by a powder fusion method or a powder sintering method and is blasted with a blasting medium according to claim
 1. 